Controlled compression furnace bonding
First Claim
1. A system for controlled compression furnace bonding of a semiconductor chip to conductive elements of a leadframe, comprising:
- (a) holding means comprising a holding member having a chip support surface for supporting a semiconductor chip;
(b) positioning means for precisely positioning conductive elements of a leadframe with corresponding bonding locations on the semiconductor chip, the positioning means comprising;
(i) standoff means for maintaining vertical distance between the leadframe conductive elements and the semiconductor chip bonding locations;
(ii) planar gravity means comprising an insert placed on top of the leadframe for providing controlled compression force against leadframe conductive elements so that all leadframe conductive elements are in conductive connection with corresponding semiconductor chip bonding locations; and
(c) furnace heating means comprising a furnace for heating and conductively bonding the conductive elements with the chip bonding locations.
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Accused Products
Abstract
Disclosed is a system and method for controlled compression furnace bonding of a semiconductor chip to conductive elements of a leadframe. The system comprises a holding member having a chip support surface for supporting a semiconductor chip and a positioning system for precisely positioning conductive elements of a leadframe with corresponding bonding locations on the semiconductor chip. A furnace heating system comprising a furnace is employed for heating and bonding the conductive elements to the chip bonding locations. The method invention comprises positioning a semiconductor chip comprising a plurality of bonding locations in a holding member with a chip support surface; providing performed bonding material for connecting conductive elements of a leadframe with the chip bonding locations; aligning the conductive elements of a leadframe with corresponding bonding locations on the semiconductor chip; moving the leadframe conductive elements toward the chip bonding locations so that the bonding material is aligned with the conductive elements in the chip bonding locations; furnace bond heating the bonding material to a point of reflow; and cooling the bonding material to complete the bonding process between the leadframe conductive elements and the corresponding chip bonding locations.
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Citations
19 Claims
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1. A system for controlled compression furnace bonding of a semiconductor chip to conductive elements of a leadframe, comprising:
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(a) holding means comprising a holding member having a chip support surface for supporting a semiconductor chip; (b) positioning means for precisely positioning conductive elements of a leadframe with corresponding bonding locations on the semiconductor chip, the positioning means comprising; (i) standoff means for maintaining vertical distance between the leadframe conductive elements and the semiconductor chip bonding locations; (ii) planar gravity means comprising an insert placed on top of the leadframe for providing controlled compression force against leadframe conductive elements so that all leadframe conductive elements are in conductive connection with corresponding semiconductor chip bonding locations; and (c) furnace heating means comprising a furnace for heating and conductively bonding the conductive elements with the chip bonding locations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for providing controlled compression furnace bonding of a semiconductor chip to the conductive elements of a leadframe, comprising the steps of:
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(a) positioning a semiconductor chip comprising a plurality of bonding locations in a holding member with a chip support surface; (b) providing preformed bonding material for connecting conductive elements of a leadframe with the chip bonding locations and for maintaining vertical distance between the leadframe conductive elements and the semiconductor chip bonding locations; (c) aligning the conductive elements of a leadframe with corresponding bonding locations on the semiconductor chip; (d) moving the leadframe conductive elements toward the chip bonding locations by placing planar gravity means comprising an insert on top of the leadframe conductive elements so that the bonding material is aligned with the conductive elements and the chip boding locations; (e) furnace bond heating the bonding material; and (f) cooling the bonding material to complete the bonding process between the leadframe conductive elements and the corresponding chip bonding locations. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification